Expresando valores por medio del dibujo: Una investigación en acción

The purpose of this study was to identify the values ​​that emerged from fourth grade students of the University of Puerto Rico Elementary School as they wrote their interpretations concerning drawings they made ​​in the Visual Arts class after listening to a story. In addition, the values ​​that prevailed among these students were also identified. The study was conducted in the context of action research and driven by two research questions that guided the process. The collection of data was carried out by administering two instruments to corroborate the participants’ responses. The analysis of the data was performed using Wolcott’s (1994) qualitative analysis model. Finally, the study’s conclusions and recommendations are presented to the reader. How to cite: Díaz-Cabrera, Ángel A. (2013). Expresando valores por medio del dibujo: Una investigación en acción. Cuaderno de Investigación en la Educación, 28, 74-90. Retrieved from https://revistas.upr.edu/index.php/educacion/article/view/13573El propósito de esta investigación fue identificar los valores que emergieron de los estudiantes del cuarto grado de la Escuela Elemental de la Universidad de Puerto Rico al redactar su interpretación acerca de los dibujos que realizaron en la clase de Artes Visuales luego de haber escuchado un cuento. Además, se identificaron los valores que predominaban entre estos estudiantes. El estudio se llevó a cabo en el contexto de la investigación en acción y se condujo a la luz de dos preguntas de investigación que guiaron el proceso. La recopilación de los datos se llevó a cabo mediante la administración de dos instrumentos que tuvieron la función de corroboraban las respuestas de los participantes. El análisis de los datos se llevó a cabo utilizando el modelo de análisis cualitativo de Wolcott (1994). Finalmente, las conclusiones y recomendaciones derivadas del estudio son presentadas al lector. Cómo citar: Díaz-Cabrera, Ángel A. (2013). Expresando valores por medio del dibujo: Una investigación en acción. Cuaderno de Investigación en la Educación, 28, 74-90. Recuperado a partir de https://revistas.upr.edu/index.php/educacion/article/view/1357

Magnetocronología de las sucesiones cenozoicas de la cuenca de As Pontes (La Coruña, Noroeste de España)

The Terciary Basin of As Pontes (Northwest Spain) is associated with an onshore NW-SE dextral strike-slip fault system. A total of 900 specimens from the sedimentary infill have been demagnetized, using thermal and alternating field demagnetization procedures. Paleomagnetic data indicate that the duration of sedimentation in the basin was about 6,2 My, lasting from the latest Early Oligocene until the Early Miocene. The magnetostratigraphy of the basin successions allows us to establish a very precise chronological correlation within the basin. In addition, the overall pattern of declinations shows a clockwise rotation (9º±4º in the sedimentary infill) with respect to the Oligocene-Miocene reference declination, coherent with a NW-SE dextral strike-slip faults system. The dating of the sedimentary infilling of the As Pontes basin establishes that the NW-SE dextral strike-slip faults system of NW Iberian Plate were highly active from the uppermost Early Oligocene to the Early Miocene. This implies that the end of the main tectonic activity in both NW Iberian offshore and onshore took place during the same time span

Hardware/software codesign of configurable fuzzy control systems

Fuzzy inference techniques are an attractive and well-established approach for solving control problems. This is mainly due to their inherent ability to obtain robust, low-cost controllers from the intuitive (and usually ambiguous or incomplete) linguistic rules used by human operators when describing the control process. This paper focuses on the hardware/software codesign of configurable fuzzy control systems. Two prototype systems implemented on general-purpose development boards are presented. In both of them, hardware components are based on specific and configurable fuzzy inference architecture whereas software tasks are supported by a microcontroller. The first prototype uses an off-the-shelf microcontroller and a low-complexity Xilinx XC4005XL field programmable gate array (FPGA). The second one is implemented as a system on programmable chip (SoPC), integrating the microcontroller together with the fuzzy hardware architecture and its interface circuits into a Xilinx Spartan2E200 FPGA.Comisión Interministerial de Ciencia y Tecnología TIC2001-1726-C02-0

Codiseño hardware/software de un sistema de dosificación basado en lógica difusa

En esta comunicación se describe la realización mediante codiseño hardware/software de un sistema de dosificación que emplea técnicas de control basadas en lógica difusa. La implementación final se ha realizado sobre una placa de desarrollo que incluye una FPGA XC4005XL y un microcontrolador Intel 8031. Para el diseño del controlador difuso se ha utilizado un entorno de desarrollo de sistemas difusos de libre distribución, mientras que la síntesis hardware del sistema se ha llevado a cabo mediante versiones educativas de herramientas comerciales.Comisión Interministerial de Ciencia y Tecnología (CICYT) TIC98-086

Force–velocity profiles in CrossFit athletes: A cross-sectional study considering sex, age, and training frequency

Introduction: The force–velocity profile has been analysed previously in different sports modalities; nevertheless, it has not been analysed in CrossFit. Objective: The aim of this study was to report neuromuscular characteristics of CrossFit athletes using their individual force-velocity profile, investigating differences according to sex, age, and training frequency. Materials and Meth-ods: 72 males (33.17 ± 6.86 years; BMI: 25.93 ± 3.64 kg/m2) and 18 females (30.11 ± 6.92 years; BMI: 23.53 ± 3.98 kg/m2) participated in this study. The force-velocity profile was calculated using Samo-zino’s method. Furthermore, neuromuscular characterization was completed with a squat jump and three drop jumps (20, 30, and 40 cm). Results: Regarding sex, significant differences in all analysed mechanical variables (p < 0.001) were found except for the theoretical maximal force (p = 0.944). No significant differences were found between age groups. Considering training frequency, athletes who train more than 5 days per week showed higher performance in all analysed mechanical variables (p < 0.05). Conclusion: CrossFit athletes have a force-velocity profile more oriented towards velocity than force. Males and females have different neuromuscular characteristics, also neuromus-cular improvements can be achieved at any age. Moreover, higher neuromuscular performance is developed with a training frequency of 5 days or more per week

Extendiendo el modelo UTAUT para evaluar los factores que afectan la adopción del Big Data en empresas españolas

La implantación de técnicas de Big Data es una realidad en la toma de decisiones de marketing. Este desarrollo cuestiona qué factores afectan a las empresas en la aceptación de estas tecnologías. En respuesta, extendemos el modelo de aceptación de tecnologías UTAUT al Big Data y añadimos el riesgo percibido como inhibidor. Modelizamos mediante ecuaciones estructurales con Smart-PLS sobre una muestra de empresas que utilizan Big Data. Los resultados muestran la mayor predicción de la extensión del UTAUT planteada y el menor efecto de variables propuestas en el modelo original

Ordenamiento ambiental y gestión costera integrada: experiencias y retos en el norte de la provincia de Matanzas (Cuba)

En Cuba, país costero con diferentes insuficiencias económicas y sociales que se deben resolver, el equilibrio con el medio ambiente costero-marino está sujeto a altas presiones humanas, y ello ocurre bajo una intensa dinámica natural y antropogénica, por lo que los asuntos de protección y gestión de zonas costeras han adquirido especial atención y prioridad. En este contexto, la provincia de Matanzas se ha perfilado como una región clásica para los estudios costeros y la aplicación del enfoque de manejo costero integrado, justamente por contar en su costa sur con el humedal más extenso y mejor conservado de Cuba: la Ciénaga de Zapata, y en su costa norte, con una subregión singular del país, que se destaca por presentar una diversidad de ecosistemas costeromarinos, que constituyen al mismo tiempo el soporte de varias e importantes actividades económico-productivas y sociales, donde sobresalen las bahías y ciudades portuarias de Matanzas y Cárdenas, el reconocido destino turístico de la playa de Varadero, y el humedal costero de Majagüillar. En este Capítulo se sintetizan las experiencias de diseño e implementación en lo referido al ordenamiento ambiental y los programas de gestión costera integrada, durante más de 15 años de esfuerzos ininterrumpidos, lo que ha demostrado que la articulación entre tales procesos es la mejor fórmula de adaptación a los nuevos escenarios ambientales y climáticos, y deja interesantes lecciones aprendidas y también importantes retos a considerar en proyecciones futuras

The Approach Landscape in the Wetlands Classification. A Case Study of the Province of Matanzas, Cuba

Los humedales, en cuanto a extensión areal, no rebasan el 6 % de la superficie terrestre, pero a pesar de ello son considerados ecosistemas de gran importancia biológica a nivel global. Debido a su complejidad, que les viene dada por su peculiar posición entre ambientes acuáticos y terrestres, no ha sido una tarea fácil su clasificación, en este sentido la utilización del enfoque de paisajes, puede constituirse en una propuesta novedosa y útil en el contexto del ordenamiento ambiental y la optimización del uso de tales sistemas espaciales. En la provincia de Matanzas (Cuba), los paisajes de humedales tienen un gran significado teórico-metodológico y práctico. En este trabajo se describen los criterios que sirvieron de base a la clasificación propuesta, se presenta la correspondiente cartografía y regionalización paisajística, todo lo cual constituye una contribución a la sistematización de los conocimientos acumulados hasta la fecha y aporta una sólida base para la toma de decisiones relacionada con el ordenamiento ambiental y territorial.Wetlands, as to areally extended, do not exceed 6 % of the Earth’s surface, but nevertheless are considered biologically important ecosystems globally. Because of its complexity, which is given to them by their peculiar position between aquatic and terrestrial environments, has not been easy classification thereof, and in this sense the use of the approach landscapes, may become a novel proposal and useful in the context of environmental management and optimization of the use of such space systems. In the province of Matanzas (Cuba), the landscapes of wetlands has great theoretical methodological and practical significance, and in this paper the criteria that were the basis for the proposed classification are described, the corresponding mapping and landscape regionalization occurs, all of which constitutes a contribution to the systematization of knowledge accumulated to date and provides a solid basis for decision-making related to environmental planning and land use

Lyman break and ultraviolet-selected galaxies at z ̃ 1-I. Stellar populations from the ALHAMBRA survey

We take advantage of the exceptional photometric coverage provided by the combination of GALEX data in the ultraviolet (UV) and the ALHAMBRA survey in the optical and near-infrared to analyse the physical properties of a sample of 1225 GALEX-selected Lyman break galaxies (LBGs) at 0.8 ≲ z ≲ 1.2 that are located in the COSMOS field. This is the largest sample of LBGs studied in this redshift range to date. According to a spectral energy distribution (SED) fitting with synthetic stellar population templates, we find that LBGs at z ̃ 1 are mostly young galaxies with a median age of 341 Myr and have intermediate dust attenuation, (Es(B - V)) ̃ 0.20. Owing to the selection criterion, LBGs at z ̃ 1 are UV-bright galaxies and have a high dust-corrected total star formation rate (SFR), with a median value of 16.9M⊙ yr-1. Their median stellar mass is log (M*/M⊙) = 9.74. We find that the dustcorrected total SFR of LBGs increases with stellar mass and that the specific SFR is lower for more massive galaxies (downsizing scenario). Only 2 per cent of the galaxies selected through the Lyman break criterion have an active galactic nucleus nature. LBGs at z ̃ 1 are located mostly over the blue cloud of the colour-magnitude diagram of galaxies at their redshift, with only the oldest and/or the dustiest deviating towards the green valley and red sequence. Morphologically, 69 per cent of LBGs are disc-like galaxies, with the fractions of interacting, compact, or irregular systems being much lower, below 12 per cent. LBGs have a median effective radius of 2.5 kpc, and larger galaxies have a higher total SFR and stellar mass. Compared with their high-redshift analogues, we find evidence that LBGs at lower redshifts are larger, redder in the UV continuum, and have a major presence of older stellar populations in their SEDs. However, we do not find significant differences in the distributions of stellar mass or dust attenuation.NASA NAS5-26555NASA Office of Space Science NNX09AF08GEuropean Southern Observatory LP175.A-0839.Junta de Andalucia TIC-114, P08-TIC03531Ministerio de Economía y Competitividad AYA2011-29517-C03- 01, AYA2010-1516

The OTELO survey. A case study of [O III]4959,5007 emitters at <z> = 0.83

The OTELO survey is a very deep, blind exploration of a selected region of the Extended Groth Strip and is designed for finding emission-line sources (ELSs). The survey design, observations, data reduction, astrometry, and photometry, as well as the correlation with ancillary data used to obtain a final catalogue, including photo-z estimates and a preliminary selection of ELS, were described in a previous contribution. Here, we aim to determine the main properties and luminosity function (LF) of the [O III] ELS sample of OTELO as a scientific demonstration of its capabilities, advantages, and complementarity with respect to other surveys. The selection and analysis procedures of ELS candidates obtained using tunable filter (TF) pseudo-spectra are described. We performed simulations in the parameter space of the survey to obtain emission-line detection probabilities. Relevant characteristics of [O III] emitters and the LF([O III]), including the main selection biases and uncertainties, are presented. A total of 184 sources were confirmed as [O III] emitters at a mean redshift z=0.83. The minimum detectable line flux and equivalent width (EW) in this ELS sample are $\sim$5 $\times$ 10$^{-19}$ erg s$^{-1}$ cm$^{2}$ and $\sim$6 \AA, respectively. We are able to constrain the faint-end slope ($\alpha = -1.03\pm0.08$) of the observed LF([O III]) at z=0.83. This LF reaches values that are approximately ten times lower than those from other surveys. The vast majority (84\%) of the morphologically classified [O III] ELSs are disc-like sources, and 87\% of this sample is comprised of galaxies with stellar masses of M$_\star$ $<$ 10$^{10}$ M$_{\odot}$.Comment: v1: 16 pages, 6 figures. Accepted in Astronomy \& Astrophysics. v2: Author added in metadat